DNS probleem

hi all after installing ispconfig.
i cant, send mail to internet
bucz of SPF record
and also Duplicate MX records
nu i whant to use my domain dns server that host by unieserver internet.
and i whant also send email from uniserver internet.

how can i disable my dns server.
just shut it down or use it for local.
should i setup my ispconfig dns manager of just live it so whit out any intry.or just local.
i,m never setup a dns server.

hi my dns probleem solved i disable the dns on my ispconfig and
i change the postfix config to relayhost = mail.speedlinq.nl
nu i can send mail to hotmail bout as [email protected]
nu wher can i change that the mail send as [email protected]
i can log to my webmail as [email protected] and not as web1_test